Your Vice Is a Locked Room and Only I Have the Key (1972) review

Struggling writer (and booze bag!) Oliviero Rouvigny (Luigi Pistilli) does not get along with his wife Irina (Anita Strindberg) - he humiliates her at a party - and is having an affair with former student Fausta (Daniela Giordano); when Fausta winds up slashed to death, he becomes the prime suspect ... and then the bodies start piling up.  It's very loosely based on the justifiably famous Poe story "The Black Cat" - the feline in question here is named Satan - and while it's violent and filled with nudity (both of which are almost mandatory for any giallo), all of the characters - including Rouvigny's twenty-year-old bisexual niece Floriana (Edwige Fenech) - are deeply unpleasant and unlikeable ... and the stylistic "choices" by Martino offend the senses (the zoom abuse, the close-ups of Satan's destroyed eyeball, the screeching, etc.).  There's one thing that we can all probably agree on: despite its faults, it might have the coolest title of any movie ever made (and it's a sentence, too!).